Fix a typo 'iff' => 'if'
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164766 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaAccess.cpp b/lib/Sema/SemaAccess.cpp
index 58b1a51..ddb5e4e 100644
--- a/lib/Sema/SemaAccess.cpp
+++ b/lib/Sema/SemaAccess.cpp
@@ -918,7 +918,7 @@
/// let AccessToBase = Merge(Access(B_i, B_{i+1}), ACAB(i+1)) in
/// if Accessible(B_i, AccessToBase) then public else AccessToBase
///
-/// B is an accessible base of N at R iff ACAB(1) = public.
+/// B is an accessible base of N at R if ACAB(1) = public.
///
/// \param FinalAccess the access of the "final step", or AS_public if
/// there is no final step.